You can include up to 3 emoticons on a line, as far as I can recall. If you placed them in chat with an app/bot, they could be sent on 3 new lines, within the same 'notice'. Possibly give you a 250x240 static image.
One of my favorite things about CB is the limitations. The CB API can do what it can, and nothing more. Tip Menu's pretty much look the same. Images are a set size. All of these limitations lead to consistency and familiarity. These are two things that make returning to CB less challenging. I think this is very important from a business standpoint.
Cheers,
Cexmental